Electric oven



FIG. 1 is a perspective view from the left top side of an electric oven showing my design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof. 

The ornamental design for a electric oven, as shown and described. 